It seems there are some additional constraints about non-existent
directories that now count as errors ..
--- sync_file.o ---
cc -O2 -pipe -fno-strict-aliasing -DLINUXKPI_VERSION=60100
'-DKBUILD_MODNAME="dmabuf"' -DCONFIG_DRM_AMDGPU_CIK
-DCONFIG_DRM_AMDGPU_SI -DCONFIG_DRM_AMD_DC -DCONFIG_DRM_AMD_DC_SI
-DCONFIG_AMD_PMC -DCONFIG_DRM_I915_FORCE_PROBE='"*"'
-DCONFIG_DRM_I915_REQUEST_TIMEOUT=20000 -DCONFIG_DRM_I915_CAPTURE_ERROR
-DCONFIG_DRM_I915_USERFAULT_AUTOSUSPEND=250
-DCONFIG_DRM_I915_STOP_TIMEOUT=100 -DCONFIG_DRM_I915_PREEMPT_TIMEOUT=640
-DCONFIG_DRM_I915_HEARTBEAT_INTERVAL=2500
-DCONFIG_DRM_I915_TIMESLICE_DURATION=1
-DCONFIG_DRM_I915_MAX_REQUEST_BUSYWAIT=8000
-DCONFIG_DRM_I915_FENCE_TIMEOUT=10000 -DCONFIG_DRM_MIPI_DSI
-DCONFIG_DRM_PANEL_ORIENTATION_QUIRKS -DCONFIG_APERTURE_HELPERS
-DCONFIG_DRM_FBDEV_EMULATION -DCONFIG_DRM_FBDEV_OVERALLOC=100
-DCONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG -DCONFIG_BACKLIGHT_CLASS_DEVICE
-DCONFIG_DEBUG_FS -DCONFIG_DMI -DCONFIG_FB -DCONFIG_MTRR -DCONFIG_PCI
-DCONFIG_PM -DCONFIG_PM_SLEEP -DCONFIG_SMP -DCONFIG_SUSPEND
-DCONFIG_ACPI -DCONFIG_ACPI_SLEEP -DCONFIG_X86 -DCONFIG_X86_PAT
-DCONFIG_64BIT -DCONFIG_AS_MOVNTDQA -DCONFIG_COMPAT -DCONFIG_X86_64
-DCONFIG_DRM_AMD_DC_DCN -DCONFIG_DRM_AMD_DC_DCN3_0
-DCONFIG_DRM_AMD_DC_DCN3_01 -DCONFIG_DRM_AMD_DC_DCN3_02
-DCONFIG_DRM_AMD_DC_DCN3_1 -Werror -D_KERNEL -DKLD_MODULE -nostdinc
-I/usr/ports/graphics/drm-61-kmod/work/drm-kmod-drm_v6.1.92_0/linuxkpi/gplv2/include
-I/usr/ports/graphics/drm-61-kmod/work/drm-kmod-drm_v6.1.92_0/linuxkpi/bsd/include
-I/usr/src/sys/compat/linuxkpi/common/include
-I/usr/ports/graphics/drm-61-kmod/work/drm-kmod-drm_v6.1.92_0/linuxkpi/dummy/include
-I/usr/src/sys/compat/linuxkpi/dummy/include -include
/usr/ports/graphics/drm-61-kmod/work/drm-kmod-drm_v6.1.92_0/obj/usr/ports/graphics/drm-61-kmod/work/drm-kmod-drm_v6.1.92_0/dmabuf/opt_global.h
-I. -I/usr/src/sys -I/usr/src/sys/contrib/ck/include -fno-common
-fno-omit-frame-pointer -mno-omit-leaf-frame-pointer
-fdebug-prefix-map=./machine=/usr/src/sys/amd64/include
-fdebug-prefix-map=./x86=/usr/src/sys/x86/include
-fdebug-prefix-map=./i386=/usr/src/sys/i386/include -MD
-MF.depend.sync_file.o -MTsync_file.o -mcmodel=kernel -mno-red-zone
-mno-mmx -mno-sse -msoft-float -fno-asynchronous-unwind-tables
-ffreestanding -fwrapv -fstack-protector -Wall -Wstrict-prototypes
-Wmissing-prototypes -Wpointer-arith -Wcast-qual -Wundef
-Wno-pointer-sign -D__printf__=__freebsd_kprintf__
-Wmissing-include-dirs -fdiagnostics-show-option -Wno-unknown-pragmas
-Wswitch -Wno-error=tautological-compare -Wno-error=empty-body
-Wno-error=parentheses-equality -Wno-error=unused-function
-Wno-error=pointer-sign -Wno-error=shift-negative-value
-Wno-address-of-packed-member -Wno-format-zero-length -mno-aes
-mno-avx -std=gnu99 -c
/usr/ports/graphics/drm-61-kmod/work/drm-kmod-drm_v6.1.92_0/drivers/dma-buf/sync_file.c
-o sync_file.o
--- dma-fence-chain.o ---
cc: error: no such include directory:
'/usr/ports/graphics/drm-61-kmod/work/drm-kmod-drm_v6.1.92_0/linuxkpi/dummy/include'
[-Werror,-Wmissing-include-dirs]
--- dma-fence.o ---
cc: error: no such include directory:
'/usr/ports/graphics/drm-61-kmod/work/drm-kmod-drm_v6.1.92_0/linuxkpi/dummy/include'
[-Werror,-Wmissing-include-dirs]
--- sync_file.o ---
cc: error: no such include directory:
'/usr/ports/graphics/drm-61-kmod/work/drm-kmod-drm_v6.1.92_0/linuxkpi/dummy/include'
[-Werror,-Wmissing-include-dirs]
--- dma-buf.o ---
cc: error: no such include directory:
'/usr/ports/graphics/drm-61-kmod/work/drm-kmod-drm_v6.1.92_0/linuxkpi/dummy/include'
[-Werror,-Wmissing-include-dirs]
--- dma-buf-kmod.o ---
cc: error: no such include directory:
'/usr/ports/graphics/drm-61-kmod/work/drm-kmod-drm_v6.1.92_0/linuxkpi/dummy/include'
[-Werror,-Wmissing-include-dirs]
--- dma-resv.o ---
cc: error: no such include directory:
'/usr/ports/graphics/drm-61-kmod/work/drm-kmod-drm_v6.1.92_0/linuxkpi/dummy/include'
[-Werror,-Wmissing-include-dirs]
--- dma-fence-unwrap.o ---
cc: error: no such include directory:
'/usr/ports/graphics/drm-61-kmod/work/drm-kmod-drm_v6.1.92_0/linuxkpi/dummy/include'
[-Werror,-Wmissing-include-dirs]
--- dma-fence-array.o ---
cc: error: no such include directory:
'/usr/ports/graphics/drm-61-kmod/work/drm-kmod-drm_v6.1.92_0/linuxkpi/dummy/include'
[-Werror,-Wmissing-include-dirs]
--- dma-resv.o ---
*** [dma-resv.o] Error code 1
make[1]: stopped making "all" in
/usr/ports/graphics/drm-61-kmod/work/drm-kmod-drm_v6.1.92_0/dmabuf
--- sync_file.o ---
*** [sync_file.o] Error code 1
make[1]: stopped making "all" in
/usr/ports/graphics/drm-61-kmod/work/drm-kmod-drm_v6.1.92_0/dmabuf
--- dma-fence-unwrap.o ---
*** [dma-fence-unwrap.o] Error code 1